We report experiments performed to describe the behavior of the experimental mass flow rate of cohesionless granular material, m(beta expt), through circular orifices of diameter D made on sidewalls of tilted bins. In such experiments, the influence of the wall thickness of the bin, w, and the tilt angle with respect to the vertical, beta, were also regarded. The experimental measurements, using beach sand and granulated sugar, yield a linear correlation among m(beta expt) and a theoretical piecewise correlation of the mass flow rate, m(beta) which is valid for the overall range of values of beta. (C) 2015 Elsevier B.V. All rights reserved.